[mythtv] Patch to autodetect 4:3 Zoom aspect ratio

[Chris Pinkham]

* On Thu Feb 28, 2008 at 10:54:13PM -0700, Justin wrote:
> This would likely work as long as you know where the cut offs should 
> be.  If not what happens if the screen has a few black lines at the 
> bottom because it is a dark part of the scene?   One thing that would 
> help prevent this would be to look over a couple frames and not a single 
> frame.   Or what if the TV icon goes over into the black bars?

The cut offs can be calculated based on the various aspect ratios that
you might find.  The commercial flagger doesn't need to know about
the different aspects, it just detects differences between full, pillar,
and letter (boxed).

The commercial flagger also ignores the area where the logo was found if it
finds one.

--
Chris